[Dog Gone]

I always thought that the demise of the dinosaurs left a vaccuum that mammals filled.

[RightWhale]

the demise of the dinosaurs left a vaccuum that mammals filled

There were mammals at the time of the dinosaurs, but they were small and hardly dominant and were inadvertently eaten along with leaves and berries. Apparently they adapted to whatever conditions wiped out most of the dinosaurs, and not being snacked upon nearly as often provided them great happiness and they thrived.

[blam]

"I always thought that the demise of the dinosaurs left a vaccuum that mammals filled."

I did too. But, apparently it was a little later, like 10 million years.

[Junior]

For awhile, birds were "top dog."

[ALS]